it's proven to instantly relieve cold or flu nasal congestion. [ stefan ] and because it's drug free, it's safe to use with any medicine to relieve my nighttime stuffy nose. so i can breathe better and sleep better. [ female announcer ] go to breatheright.com for special offers. >> pelley: tens of thousands of ravens' fans turned out in baltimore today to congratulate their super bowl champs. it was a sea of purple in the square outside city hall. later at the team's stadium where retiring linebacker ray lewis hoisted the lombardi trophy. still unclear is what caused that power outage, but our jeff glor has been looking into that. >> reporter: the monday morning quarterbacking over what caused the lights to go out continued tuesday when doug thornton, the super dome's head of operations admitted there were power problems in beyonce's rehearsals leading up to sunday's game. >> yes we had a couple of fuses blown, a couple of circuits overload but it had nothing to do with the power outage. >> reporter: the admission comes as documents we obtained today reveal a cascading level of concer